package net.dreamlu.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * MD5加密
 * @author chunmeng.lu
 *
 */
public class MD5Util {
	
	public static String getMD5Str(String str) {  
        MessageDigest messageDigest = null;  
        try {  
            messageDigest = MessageDigest.getInstance("MD5");  
            messageDigest.reset();  
            messageDigest.update(str.getBytes("UTF-8"));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
        byte[] byteArray = messageDigest.digest();  
        StringBuffer md5StrBuff = new StringBuffer();  
        for (int i = 0; i < byteArray.length; i++) {              
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)  {
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
            }else{  
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
            }  
        }  
        return md5StrBuff.toString();  
    } 
}